exe4_20.m

来自「MATLAB 简单编程 包括很基础的程序」· M 代码 · 共 12 行

clear all;
ff=inline('x.^3-2.*x.^2.*sin(x)+5.*x.*cos(x)+1./x');
fplot(ff,[0,4]);grid on;
r1=fzero(ff,1.5);r2=fzero(ff,2.5);int=quad(ff,0,r1);

%function y=fs(x)
%y=x.^3-2*x.^2.*sin(x)+5.*x.*cos(x)+1./x; save the m file;
%fplot('fs',[0 4]);grid
%fzero('fs',1.7);    by observing
%fzero('fs',2.6);    by observing